linux-kernel - Re: Linux as Bootloader

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Message-ID: <CAAMvbhETfkdvD7oro4bHcu1szwZn=uUc3TC+e3PmTrf=pZxjrg@mail.gmail.com>
Date:	Mon, 12 Sep 2011 07:20:25 +0100
From:	James Courtier-Dutton <james.dutton@...il.com>
To:	Christian Gmeiner <christian.gmeiner@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Linux as Bootloader

On 5 September 2011 09:24, Christian Gmeiner
<christian.gmeiner@...il.com> wrote:
> Hi all,
>
> I am using the linux kernel in combination with busybox and a separate
> bootloader app to
> startup a x86 based embedded device. As the used BIOS does only do
> basic hw init, we
> used Linux as a bootloader. Our custom BIOS starts the bootloader
> kernel located in BIOS
> flash. If the kernel and userland is ready our boot application
> searches for the productive kernel
> and executes it via kexec.
>
> Now I run in some troubles as I need to be able to boot a MSDOS
> application stored on
> an usb stick. I have tried grub4linux but I am not able to boot from
> the usb stick - even I
> see the grub command line.
>
> Are there some creative/working solutions for my problem?
>

To get DOS running, it relies on a PC BIOS. You don't have one.
Either implement a PC BIOS or run the dos app using dosbox, dosemu or kvm.
Just out of curiosity, what does the DOS app do?
There might be a reason why running it in dosbox, dosemu, or kvm might not work.
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